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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCT2075DP датащи(PDF) 8 Page - NXP Semiconductors |
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PCT2075DP датащи(HTML) 8 Page - NXP Semiconductors |
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8 / 37 page  PCT2075 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2017. All rights reserved. Product data sheet Rev. 9.1 — 21 April 2017 8 of 37 NXP Semiconductors PCT2075 I2C-bus Fm+ digital temperature sensor and thermal watchdog 7.2.1 Bus fault time-out If the SDA line is held LOW for longer than tto (25 ms minimum; guaranteed at 35 ms maximum), the device will reset to the idle state (SDA released) and wait for a new START condition. This ensures that the device will never hang up the bus should there be conflicts in the transmission sequence. The bus fault time-out can be disabled during manufacture and shipped under custom part number. 7.3 Slave address To communicate with the device, the master must first address slave devices via a slave address byte. The slave address byte consists of seven address bits, and a direction bit indicating the intent of executing a read or write operation. The device features three address pins to allow up to 27 devices to be addressed on a single bus interface. Table 5 describes the pin logic levels used to properly connect up to 27 8-pin devices. Table 6 describes the pin logic levels used to properly connect up to three 6-pin devices. ‘1’ indicates the pin is connected to the supply (VCC); ‘0’ indicates the pin is connected to GND; ‘Float’ indicates the pin is left unconnected. The states of pins A0/A1/A2 are sampled only at power-up. After sampling the address is latched to minimize power dissipation associated with detection. Table 5. PCT2075 address table (SO8, TSSOP8, HWSON8 packages) No. Address pin coding Slave address A2 A1 A0 1 0 0 0 1001 000 2 0 0 1 1001 001 3 0 1 0 1001 010 4 0 1 1 1001 011 5 1 0 0 1001 100 6 1 0 1 1001 101 7 1 1 0 1001 110 8 1 1 1 1001 111 9 floating 0 0 1110 000 10 floating 0 floating 1110 001 11 floating 0 1 1110 010 12 floating 1 0 1110 011 13 floating 1 floating 1110 100 14 floating 1 1 1110 101 15 floating floating 0 1110 110 16 floating floating 1 1110 111 17 0 floating 0 0101 000 18 0 floating 1 0101 001 19 1 floating 0 0101 010 20 1 floating 1 0101 011 21 0 0 floating 0101 100 22 0 1 floating 0101 101 23 1 0 floating 0101 110 |
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